Mathematical Sciences Classification System
97Uxx - Educational material and media, educational technology
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97U10Comprehensive works
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97U20Textbooks. Textbook research
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97U30Teachers' manuals and planning aids
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97U40Problem books. Competitions. Examinations
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97U50Computer assisted instruction; e-learning
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97U60Manipulative materials
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97U70Technological tools, calculators
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97U80Audiovisual media
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97U99None of the above, but in this section